add vuescan definition

nixos/default.nix

@@ -1,4 +1,9 @@
-{ pkgs, config, lib, ... }: {
+{ pkgs, config, lib, ... }:
+
+let
+  vuescan = pkgs.callPackage ./vuescan.nix { };
+in
+{
   imports = [ ./hardware-configuration.nix ];
 
   boot = { loader.systemd-boot.enable = true; };
@@ -7,6 +12,7 @@
   i18n.defaultLocale = "en_US.UTF-8";
 
   services = {
+    udev.packages = [ vuescan ];
     gnome.gnome-keyring.enable = lib.mkForce false;
 
     xserver = {
@@ -49,6 +55,7 @@
       dogdns
       tree
       dig
+      vuescan
     ];
     gnome.excludePackages = with pkgs; [
       gnome.totem

nixos/vuescan.nix

@@ -0,0 +1,60 @@
+{ stdenv
+, fetchurl
+, gnutar
+, autoPatchelfHook
+, glibc
+, gtk2
+, xorg
+, libgudev
+, makeDesktopItem
+}:
+let
+  pname = "vuescan";
+  version = "9.8";
+  desktopItem = makeDesktopItem {
+    name = "VueScan";
+    desktopName = "VueScan";
+    genericName = "Scanning Program";
+    comment = "Scanning Program";
+    icon = "vuescan";
+    terminal = false;
+    type = "Application";
+    startupNotify = true;
+    categories = [ "Graphics" "Utility" ];
+    keywords = [ "scan" "scanner" ];
+
+    exec = "vuescan";
+  };
+in
+stdenv.mkDerivation {
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = "https://www.hamrick.com/files/vuex6498.tgz";
+    hash = "sha256-qTSZuNPCi+G4e7PfnJEDj8rBMYV/Tw/ye3nDspqIPlE=";
+  };
+
+  # Stripping breaks the program
+  dontStrip = true;
+
+  nativeBuildInputs = [ gnutar autoPatchelfHook ];
+
+  buildInputs = [ glibc gtk2 xorg.libSM libgudev ];
+
+  unpackPhase = ''
+    tar xfz $src
+  '';
+
+  installPhase = ''
+    install -m755 -D VueScan/vuescan $out/bin/vuescan
+
+    mkdir -p $out/share/icons/hicolor/scalable/apps/
+    cp VueScan/vuescan.svg $out/share/icons/hicolor/scalable/apps/vuescan.svg
+
+    mkdir -p $out/lib/udev/rules.d/
+    cp VueScan/vuescan.rul $out/lib/udev/rules.d/60-vuescan.rules
+
+    mkdir -p $out/share/applications/
+    ln -s ${desktopItem}/share/applications/* $out/share/applications
+  '';
+}